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Annals of Botany
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🧪 Salinity impacts plants by causing osmotic stress, ion toxicity, and secondary stress. Alfalfa’s complex genome and out-crossing nature complicate genetic studies, but it also offers a wide range of adaptive strategies. (4/7)

Figure with 6 panels showing a comparison of alfalfa growth in normal vs. salty conditions (150 mM NaCl). Under normal conditions, seeds typically germinate after 3 days (Panel A), but salt stress significantly slows this process (Panel B). In non-saline environments, leaves are larger and healthier with higher chlorophyll levels (Panel C), while in salty conditions, leaf size and chlorophyll are reduced (Panel D). Stems exposed to salt are slightly thinner with fewer vascular bundles (Panel F) compared to normal plants (Panel E). The primary root tip and cross-section show a smaller diameter and damaged root structure under salt stress (Panels G-J). Salt exposure also causes a color change in root nodules from pink (Panel K) to green (Panel L), with fewer and smaller nodules forming in salty conditions.
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🌿 Alfalfa adapts by changing its root system, regulating hormones to maintain ion balance, and using specialized metabolite profiles. This resilience allows it to manage salt stress while maintaining crucial rhizobia associations. (5/7)

Figure with two panels showing contrasting strategies to deal with excess salt. The salt exclusion strategy (Panel A) employs different mechanisms than the salt inclusion strategy (Panel B); few plants use a combination of both or can switch between strategies.
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AO
Annals of Botany
@annbot.bsky.social
Bluesky feed for Annals of Botany articles.
306 followers14 following694 posts
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